S71909 CD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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S71909 CD/HCP4ADBA Bearing Product Overview & Core Advantages
The S71909 CD/HCP4ADBA is a high-precision duplex angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. This metric system bearing features a back-to-back (DB) matched arrangement and is preloaded to Extra light / Class A specifications, ensuring high running accuracy and system stability. Its primary advantage lies in its ability to support combined loads—simultaneously handling radial loads and axial loads in both directions. The use of ceramic balls and a phenolic cage contributes to superior high-speed performance, reduced friction, and extended service life, making it an ideal choice for high-reliability and high-precision machinery.
S71909 CD/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a series of high-precision angular contact ball bearings. |
| 1909 | Specifies the bearing size: 45 mm bore, 68 mm OD, 24 mm width. |
| CD | Denotes a Duplex Back-to-Back (DB) arrangement. |
| HC | Signifies the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4A | Specifies the tolerance class, denoting very high precision (superior to ABEC 7). |
| DBA | Indicates the bearing is preloaded to Class A (Extra Light). |
S71909 CD/HCP4ADBA Bearing Structural Features & Performance Benefits
High Rigidity and System Stability: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists moment loads, providing exceptional support for spindles and shafts. The Extra light preload eliminates internal clearance, ensuring precise rotational accuracy and minimal runout.
Superior High-Speed Capability: The combination of lightweight ceramic balls and a phenolic resin cage significantly reduces centrifugal forces and friction, enabling a high limiting speed of 46,000 rpm. This makes the bearing ideal for high-speed spindle applications.
Enhanced Load Capacity: With a 15° contact angle and a dynamic load rating of 4770 lbf, this bearing is engineered to handle significant combined radial and axial loads simultaneously.
Sealed and Pre-Lubricated Design: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is ready for immediate installation, offering long-term, maintenance-free operation within its specified temperature range.
S71909 CD/HCP4ADBA Bearing Typical Application Areas
The S71909 CD/HCP4ADBA is engineered for high-performance applications where precision, speed, and rigidity are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Instrumentation: High-speed measuring and inspection equipment.
- High-Frequency Motors and Spindles: Motors for PCB drilling and routing.
- Robotics: High-accuracy joints and arm assemblies.
